BIS Warns Stablecoins Could Trigger Treasury Fire Sales in Redemption Runs

Stablecoins are supposed to be the boring part of crypto. The Bank for International Settlements just reminded everyone that “boring” can turn into a mess fast when redemption pressure hits and issuers have to dump U.S. Treasuries to raise cash, as highlighted in the BIS warning on stablecoin fragility.

• $321 billion stablecoin market cap, with thin cash buffers underneath
• 12% of reserves in cash or cash-like assets
• 88% in yield-bearing assets, mostly short-term U.S. Treasuries
• Forced selling could spill into Treasury yields and funding markets
• BIS wants “usable buffers,” not rigid rules that spark fire sales

The warning comes from a BIS working paper, “Making Stablecoins Stable(r): Can Regulation Help?” by Tirupam Goel, Ulf Lewrick, and Isha Agarwal. The central bank for central bankers does not mince words: “Without regulation, stablecoin issuers are structurally vulnerable to runs.”

That matters because stablecoins are no longer a small corner of the crypto casino. These tokens are meant to track the value of a fiat currency, usually the U.S. dollar, and they now function as core plumbing for trading, settlement, payments, and global dollar liquidity. They are useful, fast, and often genuinely efficient. They are also built on a reserve model that can look sturdier on a dashboard than it really is under stress. That’s the part the industry prefers to gloss over while calling everything “stable” and hoping nobody checks the exits.

The BIS says the sector’s reserve mix is the weak point. Cash and cash-like assets make up only about 12% of representative reserve portfolios, while roughly 88% sits in yield-bearing assets, mainly short-term U.S. Treasuries. Treasury bills, or T-bills, are short-term U.S. government IOUs that are usually considered safe and highly liquid. Usually. But if a major stablecoin issuer is hit with a redemption wave, “usually liquid” can become “good luck selling that at a fair price” in a hurry.

That’s why redemption pressure is such a big deal. Put simply, if too many holders try to cash out their stablecoins at the same time, the issuer may need to sell reserve assets quickly to pay them back. That can force sales of Treasuries under pressure, and when enough players are doing the same thing, markets stop being orderly real quick.

The BIS estimates stablecoin issuers collectively hold around $155 billion in U.S. T-bills, with Tether named as one of the biggest holders of short-term U.S. government debt. That scale means a stablecoin run would not just be a crypto problem. It could become a short-term funding market problem, with spillovers into the broader U.S. Treasury market. The BIS puts some numbers on that risk: $10 billion in forced selling could move 3-month Treasury yields by about 2.9 basis points, while $30 billion could move them by around 6.4 basis points.

For anyone outside fixed income, a basis point is one-hundredth of a percent. Tiny in percentage terms, but meaningful in a market that helps set the price of global dollar liquidity. Treasury yields are not meme coins; they are the plumbing beneath the plumbing.

The BIS also runs a stress scenario equivalent to a two-standard-deviation redemption shock, which is just finance-speak for a large but plausible wave of redemptions based on historical volatility. Under that unregulated scenario, weekly default probability rises above 15 basis points. Not exactly a glowing review for a product sold as a digital dollar substitute.

There is precedent for this fragility. The March 2023 USDC stress event, tied to Silicon Valley Bank, showed how quickly confidence can crack when reserve exposure becomes visible. USDC did not implode, but it wobbled hard enough to remind everyone that “stable” does not mean invincible. A stablecoin is only as stable as the market’s confidence in its backing. Branding is not a balance sheet.

The BIS makes another important point: the industry’s reserve model often looks closer to a “capital-light financial institution” than a traditional deposit-taking bank. In plain English, that means stablecoin issuers can operate with relatively little cash on hand compared with banks, while still promising holders something that behaves like money. That’s fine until everyone wants their money back at once. Then the cracks show.

What makes the BIS paper more interesting than a standard “crypto bad” lecture is that it does not just call for more reserves in the abstract. It argues that regulation should focus on usable liquidity and capital buffers, not rigid hard floors that might actually make a crisis worse. That is the classic policy trap: if rules are too stiff, they can force issuers to sell assets immediately during stress, which helps create the very fire-sale dynamics regulators are trying to stop.

The BIS calls this the “usable buffer” framework, built around two ideas:

• Liquidity Requirement (LR) — resources that can be used quickly to meet redemptions
• Capital Requirement (CR) — a small buffer of loss-absorbing funds

The point is not to pretend stablecoin issuers should function like old-school banks. The point is to make sure they can survive a redemption shock without turning into a Treasury market fire-sale machine. In the BIS’s modeling, a combined LR of 5% and CR of 0.125% could reduce weekly default probability to around 0.7 basis points and trim the estimated Treasury-market impact to about 2.7 basis points. That is a meaningful improvement, and it shows that smarter regulation can reduce risk without turning the sector into a bureaucratic corpse.

“Forced asset sales could transmit shocks directly into the U.S. Treasury bill market.”

“Regulation can backfire.”

“Stability cannot rely on branding alone.”

That last line should be carved into every stablecoin marketing deck on earth. Too many projects in crypto love the word “stable” because it sounds reassuring, while quietly chasing yield with the other hand. If your reserve model depends on earning money from assets that may be difficult to liquidate in a panic, then the product is not magic. It is risk management with a nicer logo.

To be fair, the stablecoin bulls are not completely wrong either. These tokens are useful precisely because they bridge crypto and dollar liquidity better than most alternatives. They settle fast, they are widely integrated, and in many cases they have held up through serious stress. That is not nothing. Stablecoins fill a niche Bitcoin does not try to fill: a centrally issued, dollar-denominated settlement layer for trading and payments. The problem is that usefulness does not cancel counterparty risk. It just makes the risk matter more.

That is why this warning lands at a sensitive time. Stablecoins are increasingly infrastructure, not a side show. The more they become part of on-chain settlement and global liquidity flows, the more their reserve mechanics matter to actual financial stability. If a major issuer gets hit by redemptions, the fallout would not stop at the edge of crypto Twitter. It could ripple into Treasury bill markets, short-term funding conditions, and possibly policy debates far beyond the digital asset crowd.

Countries still shaping stablecoin rules, including South Korea, are likely to pay attention. So will regulators everywhere else trying to decide whether these tokens are a useful payment rail, a shadow banking substitute, or both. The honest answer is that they are a bit of each. That dual nature is exactly why the sector attracts both adoption and scrutiny.

For Bitcoin holders, there is a familiar lesson here: centralized dollar proxies are convenient, but convenience comes with custody risk, reserve risk, and the old Wall Street habit of reaching for yield while promising safety. For the broader crypto market, the message is even sharper. If stablecoins want to sit at the center of crypto finance, they need more than trust-me branding and a prayer that redemptions stay polite. They need real resilience.

What is the BIS warning about stablecoins?

The BIS says stablecoins are structurally vulnerable to runs and could trigger forced sales of U.S. Treasuries, creating spillover risk in broader financial markets.

Why does stablecoin reserve composition matter?

Because only about 12% of reserves are in cash or cash-like assets. If too many holders redeem at once, issuers may have to sell Treasuries quickly to meet withdrawals.

How could stablecoin runs affect the U.S. Treasury market?

Forced sales of Treasury bills could push yields higher and disturb short-term funding markets. The BIS estimates $10 billion in forced selling could move 3-month yields by about 2.9 basis points.

What happened with USDC in March 2023?

USDC faced a major redemption scare after concerns tied to Silicon Valley Bank. It did not collapse, but the episode showed how quickly confidence can break when reserve risk becomes visible.

What does the BIS recommend?

It recommends a “usable buffer” framework with a Liquidity Requirement and Capital Requirement, designed to help issuers handle redemptions without triggering fire sales.

Why not just force stablecoins to hold more reserves?

Because rigid reserve rules can backfire. If issuers are forced to liquidate assets too aggressively during stress, they can worsen the very crisis regulators are trying to prevent.

What is the bigger takeaway for crypto?

Stablecoins are useful financial plumbing, but they are not risk-free. If they are going to sit at the heart of dollar liquidity and crypto settlement, they need real buffers, not just marketing and vibes.